Centrifugal apparatus for separating purposes.



,E. JAHN. GENTRIFUGAL APPARATUS FOR SEPARATING PURPOSES.

APPLIOATION I'I LED MAY 18, 1909.

Patented Aug. 10, 1909.

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. paratus for separating purposes an hnusr JAHN, oe'nRNsWALnE, GERMANY.

CEHTBIFUGAL APPARATUS FOR SEPARATING PURPOSES.

To all who m 'it ma-y concern:

Bent known that; I, ERNST JAHN, civil engineer. a subject of the GermanEmperor, residing at- Arnswalde, in the Kingdom of Prussia, Germany,have invented certain new and useful Improvements in CentrifugalApparatus for Separating Purposes; and I do hereby deelare'thefollowing'to be a full. eleal'. and exact description of the intention,sueh'as will enable others skilled in the art to which itappertains tomake and use. the saute. i

This invention relates to centrifu a'l 3p?- i l' more particularly tocentrifugal apparatus for separating in'the order of their specificgrarities solid particles suspendedin a liquid or less specific gravity.

gal apparatus havingya,,eonical drum receiving the suspendethiparticlesat its nar-- row end. with a worm in the said drum for discharging saidpartieles when" separated; a suitable outletor outlets beingprovidedl'or the liquid. v

.Ylhe present improvements Consist in the arrangement of said outlet airoutlets for the susi'iendingliquid in the wideend of the drum. at adistanre from the drum 3X15 greater than the radius of the apertureprolt has been pro-' posed to employ for such purpose centrifuvided inthe mrrow end of the drurn for' the entrance and exit of the separatedpar-- out. 'By the rapid rotation of the drum, the lighter particles ofthe mixture to be separated (which rotate with the drum in an inner.zone of the same) are thrown out throng-h the outlet an outlets in theWide end of the drum while the heavier particles which are pressed hycentrifugal action against theIsjdt-s' ot' the dra n, are conveyed bymeans of the worm to the discharge opening at the narrow end of thedrum. This o a-ning has a diameter such that the Fjlllftlt't oi theliquid which assiunes a paraholir .-hape. will not extend as far as thesaid opening.

The arron t'aurrin g drawing illustrates in central longitudinal sectiona (-onstruction of centrifugal separator having a vertical axis'emhodying the improvementsin this invention. I v

7) represent a trust:i-co'nieal drum havingits upper end open. as shownat e. ventrally inountrd on the hollow shaft \\lllt'll is-revuli'ed byany suitable means (not shown. The hottoui of the drum is T he drumSpecification of Letteris Patent. Application filed Kay 18, 1909.SerialNo. 496,776.

\ fiat, and in said bottom Patented Aug. 10, woe.

lets 0. These outlets are located at a greater distance from the axis ofthe drum than the length of the radius of the upper open end of thedrum. g is a shaft passing centrally through the hollow shaft f andGenare provided outtrally through the drum, and this shaft g may also berevolved by any suitable means (not shown). To the shaftyg is attached aconical skeleton frame, having aworm or spiral conveyor 61 on itsoutside, which fits closely within the drum 1). v

a is a pipe for supplying the material under treatment to the drum.

Q'Ihe Wormv 65 may be either right-handed or left-handed, as'desired.There maybe a series of outlet openings 0.

The worm may rotate 1n the same direo t ionfas the drum, According asthe worm is left handed or right-handed, its speed of rotation will beslightly greater or less than that of the drum. In any case, it engagesthe heavy particles that are thrown agamst the inner wall of the drum,and it conveys them gradually toward the narrow opening of the drum. Bythis means special bladesfor collecting the separated substances aredispensed with, whereby the wear and tear caused by such heaviersuhsta-ucesis lessened and the machine runs easier.

The mode of operation of the centrifugal apparatus isas follows: It isassumed that the separator is rotatin and that the mixture to heseparated, say for example, .water containing washed clay in suspension,is being charged into the drum through the pip'e a. This mixture ofwater and clay is at once thrown against the sides of the drum 7). Asiawell known, tashed clay like most suhstanrcs for Which-"the apparatusdesigned. is composed of larger and smaller particles. particles arethrown off at once against the sides of the drum and are conveyed upwardhy the worm. The smaller lighter particles of clay pass down with theWater, and are separated gradually-in their passage on a vertical axis,

The larger heavier-.1

down along the sides of the drutn, until they are engaged by the wormand conveyed lip-.

ward in their turn. Thus as heavier-partioles have only a short distanceto travel in the drum, while the lighter particles travel almost to thebottom of the drum. whence they are carried up by the worm along theentire length of the drum to the top thereof.

' The rapiditywith' which the-particles are.

- and the Width the len separated and the speed of their travel to thetop 01'" the drum dependon the manner in which the mixture is chargedinto the drum, because only the same" quantity of liquid can fiow outfrom theoutlet 0 as is charged in at the top through the ipe al Duringthe centrifugal treatment, t e con stituent of the mixture which issituated nearest the axis of the separator, that is to say, the liquid;forms a parabolic surface the apex of which is situated either inside oroutside the drum, acoordin to'the speed of rotation of the latter. ow,since the radius of the up r opening' in the drum is smaller than theist anceof the outlet 0 from the axis of the drum, the-surface of theliquid will not extend as far as the discharge! spring 6 of the druni'-becau se assuming that scribed.

the amount of mixture discharged into the drum is not greater than the.apparatus is able to discharge, so'much liquid will always flow outthrough the outlet .6 that the upper I edgeof the liquid cannot reachthe openg ing 6. The fact that'the. upper discharge opening in the drumhas a smaller diameter than the circle struckfrom the drum axis as acenter through the outlet 0, is therefore a feature of considerableimportance. Owing i to this difilerence, there is produced in front 5 ofthe discharge opening e a dry zone -f through which the heavierparticles will be conveyed out of the surface of the liquid by the worm;The amount of the said difierence will determine the Width of this zone,of this zone will determine h of time durin which the mate- 1 rialwil heraised out 0 the liquid by the certain extent. 4 This length of time maybe varied for instance by lengthening or shortening the upper part "ofthe drum, or by varying the area-of the outlet or outlets c. i Theoperation is the same if the apparatus Worm and thereby practicallydried to a has a horizontal axis of rotation.

' jnstiuent.

l The improved centrifugal apparatus is i capable of workingcontinuously after ad- I l ciuim:-- 3 t. In a centrifugal apparatus thecombil'he periphery of theof said frame at its lower end being nation ofa hollow nation of a drivin shaftya vertically dis posed frusto-conicadrum mountedon said riving shaft, said having'its upper end entirelyopen and its -lowergend closed, said closed lower end hein provided witha downwardly disposed disc r e ated fartherfrom the axis of t edrum thanopen end; a second shaft entering said drum centrally; uskeleton frame,of the same contour as said drum, carried by said second shaft; theperiphery dis osed disbctween the wall of said drum an sai charge outletand at a considerable distance beyond said discharge outlet; and meansintroducing the material to be treated into said skeleton frame;substantially as de- 2. In a centrifugal apparatus the combishaft; a.vertically arranged frusto-conicul drum centrally mounted on said shaft,said drum having its upper end entirely open and its lower end closed,downwardly disposed ingprovidcd in-said closed end; a second shaftpassing through said hollow shaft; a skeleton frame secured to saidsecond named shaft, having its longitudinal members parallel to theinner, surface of said drum and extending upwardly through the open endof said drum; a spiral conveyor mounted on the outside of said skeletonframe; and means for feeding the material to he treated into the upperopen end. of the skeleton frame; said downwardly disposed dischargeERNST JAHN.

Witnesses:

A. C. BUSANNY, MARTHA DuANsrnLn.

outlet situdischarge outlets be-,

and at a disdrum further,

